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MARTIN G. IMBACH, OF HARTFORD, CONNECTICUT, ASSIGNOR TO JAMES L; HOWARD, OFV THE SAM-E PLACE.

Lettera Patent No. 72,203, dated December 17, 1867.

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Be it known that I, MARTIN Gr. IMBAGH, a resident of Hartford, inthe State of Connecticut, have invented a new and useful Improvement in Reversible Ventilators for .Railroad-Cars, &c. and that the following is e` full, clear, and exact description and specification of my said invention.

The object of my inventionis to enable the position ofthe deector of a Ventilating-aperture to be reversed in position with certainty and facility. Previous to my invention', a deector turning upon pivots has had its positions reversed by means of a handle or lever, and thisy arrangement answers a goed purpose when each deiiectoi is reversed separately but it is desirable that a number of such deectors should he reversible simultaneously, and to this end they have been connected in a series or gang by cords. Y In this case it is mpracticable to adjust all the detlectors and the connecting-cords so accurately that ,each deector of the series will be always noved to the desired extent, and held there, as a slight dierenoe in` the length ot' some one or more of the connectingcords, or la slight diiierence in the'length of the levers whichcommunieate betweenV the connecting-cords and the deectors, will vary the extents of movement of the deileetors. In order to obviate this defect, I have con binedl the deilector of the'ventilator with a spring infsuch manner .that when force is applied to reverse the position of the deflcctor, the spring is iiexed; and when the deiiector has been moved a part ot' the required y distance, the spring, reactingnpon the deectoycompletes the movement, whether the force applied to the dedector is adequate for the purpose or not. IIence, each deilector'of afconn'ected series will bemoved to thereqLnired extent to complete its 'reversal in position with certainty, even though the connecting-cords vary een siderably in length, or the adjustment of the copnecting-le'vers or their equivalent in dii'erent defiectors of the f i series be unequal. y'

In order thatmy invention may befully understood, I will proceed to describe the best mode which-Ihave thus far devised of embodying it in practice, referring'to the accompanying drawings and to the letters and figures marked thereony Figure 1 representing an elevation of the exterior of a ventilator-frame with a. reversible deflectol,

Figure 2 representing a top View of the same, and4 h Figure 3 representing a vertical section -of the same, with theventilator reversedlhali way.

The ventilator-frame `A is constructed with a Ventilating-aperture, B, and is itted at its exterior. with a reversible deilector, C, which, in this case, is a doublemouthed hoodarranged to oscllate upon two pivots a a, which connect it with ears -b Zz, projecting from the ventilator-frameA. This deflectorhas a lever, D, secured to it for the purpose of reversing the position of the deiieetor, or moving it from the position in'whicht is drawn in black lines, in iig. 2, to that in which it isrepresented in red lines therein, and vz'ce versa, so that'the mouth e, which was open in one position, is closed in the other.' The spring E, for completing the reversal of the dci'lector, is riveted at one end of the ventilator-i`rame, and its other end, g, is \`/formed, and is arranged to act upon a V-i'ormed projection, Insecured-t'o the operating-lever D. The central line ofthe V-formed end ofthe spring E is opposite the centres of the pivots a a, upon which thedeileetor C turns, andthe central line Y ofthe V-formed projection 7L corresponds with that ofthe operating-lever D. Hence, rwhen the operatingllever D is moved for the purpose of reversing theposition of the deiiector C, the springE'is iiexed during the itirst half of 'the movement by the action of one incline of the projection z upon the corresponding incline of the spring end g, but as soon as the operatinglever is a little more than half way, the other incline of the spring end g, bearing against the corresponding other Vincline of the projection h, permits the force of the spring to become available in movingthc lever D and the deiiector the required distance to complete-their reversal in position. In practice, the lever ends of nnumber of deliectors' at one side oi' a railroad-car are connected by cords, and the. end cord is pulled tofreverse the dedector; andfas each'deiectoris provided with its appropriate spring, eacli is -shi'ited by. lthat spring to its-reversed position ais sooniasfits'vfleverfllhas b'eenmoved a trifle pest its half-way or central position by thepull of the cord.l The spring, in addition to moving the deiector, acts as a stop to hold it in its position until a reversal is'requiied, thereby obviuting the necessity of fastening the cord or the deflee'tor by a special device. i

I do not claim any one ofthe members individually of which my combination is composed nor do restrict my invention'to the peculiar form or construction of the `members, as these may be greatly varied without n substantial deviation from my invention.

What I claim as my invention, and desire to secure by Letters Patent, is The combination of o. reversible delector with a. spring for moving the same, substantially as before set; forth. In testimony whereof, I have hereto set my hand, this 2d day oi' November, A. D. 186i'.

M. G. IMBACH.

Witnesses r ALBERT L. BURKE, GEO. C. BARNES. 

